William phillips



(No Model.)

W. PHILLIPS, DIE FOR INOASING METAL TUBES.

' Patented Deb.

. mnum'ssmrAr s ArENr WILLIAM PHILLIPS, OF YVATERBURY;CONNECTICUT, ASSIGNOR TO THE \VA'IERBURY BRASS COMPANY, OF SAME PLACE.

DIE FOR INCASING NIET-ALTUBES.

SPECIFICATION forming part of Letters Patent No. 550,724, dated December 3, 1895.. Applioation'filed August 20, 1394. Seria1 No.520,808- (NO model.)

To all whom it may concern:

3e it known that I, \VILLIAM PHILLIPS, a subject of the Queen of Great Britain, and a resident of \Vaterbury, in thecounty of New Haven and State of Connecticut, have invented new and useful Improvements in Dies for lncasing Metal Tubes; and I do herebydeclare the following to be a full, clear, and exact description of said invention, reference bcinghad to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to an improved combination-die for incasin g metal tubes or pipes with a sheet-metal covering,whereby said coverin g may be readilybent aroundthe tube and its edges overlapped and flattened, makinga lock-joint, and the material of the liningtube depressed to form a seat for said joint.

The invention consists in the novel con-' strnction and combination of parts hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a central longitudinal section of a combination-die constructed in accordance with my invention. Fig. 2 is a longitudinal section of the first die, showing the groove therein, the seam-former being removed. Fig. 3 is a front view of the same. Fig. 4 is aperspeetive View of the seam-former removed. Figs. 5, 6, 7, S, and 9 are cross-sections of the tube and its cover, showing the different steps in the process of'making the same.

in the said drawings the reference-letters A and 13 designate two rectangularplates, each provided with an aperture C and D, with flarin g mouths, forming dies or draw plates. These plates are connected together by means of bolts E. The second die, B, is somewhat smaller than die A,and the said die A is formed with a horizontal groove F, one side of which is tapering, as seen in Fig. 3. Located in this die is the free end of a seam-former consistin g of a steel bar G, which is beveled at H or on the side opposite the beveled side of the groove. This former consists of a steel bar bent over upon itself near the center and one end bent upwardly,as seen in Fig. 1, forming an arm I, which is seated in a rectangular groove or recess in the upper side of the plate A and is held in place by a bracket K, have ing a similar groove or recess, and secured to the said plateby means of bolts L.

By loos- V ening these bolts the said formermaybe adso as .to be at the proper distance from the beveled groove in the die-plate. A tube a is then formed by any suitable machine into an approximately circular or cylindrical form with its edges not quite touching and its ends tapered or cut away, soas to be readily passed through the dies. I then take a strip of sheet metal I), such as brass, of a width somewhat greater than the circumference of the tube, and cut away the ends and then bend itfor a short distance into the form shown in Figs. 5 and 6. The ends of the tube a and sheet I) are then passed through the dies and grasped byapair of tongs. By now drawing the same through the dies the edges of said sheet I) will be turned over and lapped and flattened, as seen in Figs. 7, 8, and 9, forming a lockjoint. After passing through said first die the tube and cover will enter and be drawn through the second die, which, being smaller than the first one, will still further flatten the joint or seam and force the same inwardly, depressing the lining-tube thereat and forming a seat for the seam or joint, whereby the cover is prevented from turning on the tube.

The depression in the lining-tubeis due to the fact that the dies are different, one of them being formed with an internal flaring mouthed groove for the lap-edges of the covering and the other without such groove.

As the lining-tube and covering are drawn through the grooved die, the edges of the lat ter are turned over and locked, and when subsequently drawn through the second die without the groove the locked edges are forced downward against the outer wall of the lining-tube and form a depression therein the edges, and when passing through the plain die the folded edges of the cover are bent down and depressed into the wall of the lining-tube, as stated.

I prefer to make the lining-tube of iron or steel and the cover of brass, although any other materials found suitable may be e1nployed in lieu thereof.

In an application of even date herewith, Serial No. 520,807, I have claimed the method or process of making said metal incased or covered tubes, and therefore layno claim thereto'herein.

Having thus fully described my invention, what I claim is- The combination with the die having a flaring opening and a longitudinal groove therein, and the "die connected therewith havin g a smaller plain opening, of the seam or joint former consisting of a metal bar bent over upon itself at or near the center forming two arms, one of which is beveled or tapered and located in said groove and the other bent at an angle forming a short arm, and the bracket for holding said bar in place, substantially as described.

In testimony whereof I aflix my signature in presence of two subscribing witnesses.

hi WILLIAM PHILLIPS. [n s.

mark 

